# Galaxies as Probes of the Particle Physics Nature of Dark Matter

- Institution: CERN
- Department: Theory Colloquia
- Speaker: Mariangela Lisanti
- Year: 2024
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3001422)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

The hypothesis of Cold Dark Matter (CDM) has been spectacularly confirmed on the largest scales of the Universe and must now be stress-tested on sub-galactic scales. Many well-motivated and generic alternatives to CDM can leave spectacular signatures on precisely these scales, affecting the evolution of galaxies as well as their population statistics. Excitingly, over the course of the next decade, a flood of astrophysical data will open the possibility of searching for these distinctive imprints and shedding light on key questions about dark matter. In interpreting such results, systematic studies using both semi-analytic codes and numerical simulations will play a critical role in robustly disambiguating dark matter signals from other standard baryonic processes. As a concrete example, I will describe the consequences for galaxy formation when the dark matter can self-scatter, highlighting the scenario where the interactions are dissipative and a sub-component of the dark matter efficiently cools inside galaxies. .

0:00:00 Slide 1

0:02:27 Slide 2

0:05:15 Slide 3

0:07:23 Slide 4

0:08:48 Slide 5

0:10:13 Slide 6

0:12:45 Slide 7

0:15:18 Slide 8

0:16:54 Slide 9

0:18:22 Slide 10

0:19:24 Slide 11

0:21:01 Slide 12

0:22:57 Slide 13

0:24:07 Slide 14

0:25:20 Slide 15

0:27:40 Slide 16

0:29:16 Slide 17

0:32:49 Slide 18

0:34:19 Slide 19

0:35:42 Slide 20

0:38:08 Slide 21

0:40:15 Slide 22

0:41:28 Slide 23

0:47:48 Slide 24

0:49:52 Slide 25

0:51:24 Slide 26

0:52:31 Slide 27

0:53:50 Slide 28

0:55:38 Slide 29

0:56:40 Slide 30

0:58:38 Slide 31

1:01:27 Slide 32

1:03:59 Slide 33

1:16:25 Slide 34

## Lectures

1. [Galaxies as Probes of the Particle Physics Nature of Dark Matter](https://invisiblenetwork.ai/learn/cern/3001422/e524f99d5351), 1 h 18 min (CERN's player)